Customer Retention Rate Calculator

Measure the percentage of customers who stay loyal.

Customers at Start of Period New Customers Acquired Customers at End of Period

What is Customer Retention Rate Calculator?

Customer retention rate measures what percentage of your existing customers you successfully kept during a given period. It is one of the most powerful indicators of product-market fit, service quality, and long-term business health — because retaining a customer is almost always cheaper than replacing one.

How to Use This Tool

1. Enter the number of customers at the start of the period. 2. Input how many new customers you acquired during the period. 3. Enter the total customers at the end of the period. 4. Calculate your retention rate.

💡 Pro Tip: Even a 5% improvement in retention can increase profits by 25–95% according to classic customer loyalty research. Use this calculator monthly, set a target retention rate, and track the impact of every service improvement you make!